Cap for building columns



J. LALLY CAP FOR BUILDING COLUMNS Filed Sept. 25 1925 2 Sheets-Sheet 1 INVENTOR (l /z lazily JJLQZTML I A ORNEY Oct. 30, 1923.

J. LALLY GAP FOR BUILDING COLUMNS Filed Sept. 25 1923 2 Sheets-Sheet 2 ub/m $232,

w gwo Patented Oct. 30, 1923.

UNITED STATES JOHN LALLY, OF BOSTON, MASSACHUSETTS.

on non BUILDING COLUMNS.

Application filed September 25, 1923. Serial No. 664,700.

To all whom it may concern:

Be it known that I, JOHN LALLY, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Caps for Building Columns, of which the following is a specification.

My invention relates to steel caps intended to replace cast iron caps on building columns and it is my objectto produce a cap which will be lighter, stronger, cheaper to produce and which will not slip on the column end and which can be'formed with a die in a single operation. The cap is also provided with integral struts or brackets which serve to stifl'en the crown plate and enable it to carry increased loads.

In the drawing Fig. l is a side View of my improved cap, on a column, and partly in section; Fig. 2 a bottom view of the structure of Fig. 1, on the line 2-2 thereof, and partly in section; Fig. 3 is a side view of a slightly modified form of the cap on a column, partly in section; and Fi 4 is a bottom view of the structure of ig. 3 on the line 4--4 thereof, and partly in section.

The column proper is the usual steel tube 1 with a concrete reinforcing filling 2 therein. SIhe cap is a steel crown plate 3 of suitable thickness to carry the desired load and has the bolt holes 4, 4, 4, 4 and the flanges 5, 5, 5, 5, formed therein, preferably by the operation of a single die, the holes being punched out and the flanges slit and bent at an angle to the plate. A plurality of these flanges are formed at such distances apart that their free ends will contact with the outside of the casin 1 when the cap is laid on the column there y preventing shiftingof the cap on the column. These flanges, in the preferred form of my cap, are bent at an angle of about 45 to the plane of the plate and if their ends are welded to the pipe 1 they form struts or brackets supporting the crown plate 3 at some little distance from the area of contact with the end of the filled tube or pipe as well as forming a centering and retaining device which prevents slip-ping of the crown plate or cap 3 on the pipe end. 1

In Figs. 3 and 4 I have shown a slight modification of the lugs 5', 5', 5, 5' which are bent at right angles to the plane of the plate 3 and which contact with the exterior of the casing 1 when the cap is laid on the '3 and 4. Another advantage in this form of lug is that the lesser degree of bending in forming the lugs reduces the liability of breakage of the lug at the bend.

The welding may be omitted if desired and the flanges used as a centering device and connection between the crownplate and pipe.

If desired that cap can be further secured to the casing or concrete, or both, in any desired manner.

A steel beam (1 or a wooden beam 6 may then be laid on the cap and secured by bolts through the holes 4, 4, 4, 4.

These flanges perform the same functions as a ring around the column and hold the cap in position, the inside of the flanges bearing against the outside of the casing or pipe. As the cap is preferably made of steel plate and as steel is cheaper than cast iron per pound and as the thicknem of the cap is reduced one-half for the same strength there is a saving of over one-half in cost from the use 'of my cap- I claim 1. A- column cap comprising a plate of metal adapted to rest on a column end and a plurality of flanges slit and punched from said plate at a distance from the edges thereof and bent at an angle to the plane thereof and adapted to engage the side wall of a column end.

2. A column cap comprising a plate of metal adapted to rest on a column end, a plurality of bolt holes therein and aplurality of flanges slit and punched from said plate at a distance from the edges thereof and bent at an angle to the plane thereof and adapted to engage the side walls of a column end.

3. A column cap comprising a plate of metaLadapt-ed to rest on a column end and a plurality of flanges slit and punched from said. plate at a distance from the edges thereof and bent at an angle to the plane thereof 4. A column cap comprising a plate of said plate at a distance from the edges theremetal adapted to rest on a column end and of and bent at an angle to the plane thereof, a plurality of flanges slit and punched from the free ends of saidflanges being adapted said plate at a distance from the edges thereto engage the side walls of a column end, in of and bent at an an le to the plane thereof, combinationwith a. column, the flange ends the free ends of said flanges being adapted and side walls of the column being welded to engage the side Walls of a. column end. together 5. A column cap comprising a plate of In testimony whereof I have afiixed my metal adapted to rest on a column end and signature.

10 a. plurality of flanges slit and punched from JOHN LALLY. 

